he could be a bust or he could be a solid started for years to come and You won't know that if you don't play him IMO

Exactly.

Some Steelers fans were angry that Hines Ward was starting over the R1 pick (Troy Edwards). Once training camp starts, coaches could not care less when you were drafted; they cared how you perform... and Beachum performed very well.

Mike Webster was a R5 pick... who would not have started... except for the fact that he played well. The round that a player was drafted in has little to do with how good they will be.